Companion Flange

  • Available with all common casing and tubing threads in all API flange sizes, pressures and trims.
  • Hot-dipped galvanized flanges conform to ASTM A153.
  • Companion flanges threads conform to ASME B1.20.1.
Category: Tags: ,


Companion Flange


A Companion Flange, sometimes referred to as a hub, is a flange that corresponds to another flange. It has bolt holes that align with another flange is a trait of this type of flange. Usually a companion flange features a Raised Face (RF) or Ring Joint (RTJ), with a threaded outlet. Also called a Threaded Flange by some people.

Techanical Specification

Size: 1-13/16″ – 26-3/4″

Working Pressure: 2000PSI, 3000PSI, 5000PSI, 10000PSI, 15000PSI, 20000 PSI

Standard Material: AISI 4130(forged) 75K/ 410 Stainless Steel

Face Type: RTJ, FF, RF

Connection: Bolted or Studded

Surface Treatment: Anti-Rust Oil, Transparent/Yellow/Black Anti-Rust Paint, Zinc, Hot Dipped Galvanized.

Temp Class: K-V

Material Class: BB, CC, DD, EE, FF

PSL Rating: PSL1, PSL2, PSL3

PR Rating: PR1, PR2


There are no reviews yet.

Be the first to review “Companion Flange”

Your email address will not be published.